本组5例均系门诊病人,全部为男性。年龄18～47岁,平均32岁。吸咽史最短2年,最长15年以上,平均日吸烟量在20～30支左右。平时身体健康,无心脏病史,都在玩扑克、下棋或会议期间于短期内连续吸烟10支以上(平均为16支)就出现头昏、心慌、恶心等症状。5例心电图改变:心房颤动1例; The group of 5 patients were outpatients, all male. Age 18 to 47 years old, average 32 years old. Suction history of the shortest 2 years, up to 15 years or more, the average daily smoking in about 20 to 30. Usually in good health, no history of heart disease, are playing poker, playing chess or during a meeting in the short term continuous smoking more than 10 (average 16) appeared dizziness, palpitation, nausea and other symptoms. 5 cases of ECG changes: 1 case of atrial fibrillation;